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Signature Series 5W-20 Synthetic Motor Oil

Product code : ALMQT-EA

A New Level of Motor Oil Technology

75% more engine protection against horsepower loss and wear.1
50% more cleaning power vs. AMSOIL OE Motor Oil
• Protects turbochargers 72% better than required2 by the GM dexos1 Gen 2 specification.
Trusted by professional engine builders
Guaranteed protection for up to 25,000 miles or 1 year

1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.

75% more engine protection against horsepower loss and wear.1
50% more cleaning power vs. AMSOIL OE Motor Oil
• Protects turbochargers 72% better than required2 by the GM dexos1 Gen 2 specification.
Trusted by professional engine builders
Guaranteed protection for up to 25,000 miles or 1 year

1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.
2Based on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.

Signature Series 5W-20 Synthetic Motor Oil



Engineered for enthusiasts seeking maximum protection and performance. Precision-formulated with cutting-edge technology and a longstanding devotion to making the world’s best motor oil. The result: engine protection that blows the doors off the highest industry standards.

See the Product Data Bulletin for full details.

Fights Engine Wear

  • 75 percent more engine protection against horsepower loss and wear1 than required by the industry standard, extending the life of vital components like pistons and cams.
  • Develops a strong fluid film that keeps metal surfaces separated.
  • Robust anti-wear additives further reduce wear in metal-to-metal contact regions for maximum engine life.

1Based on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.


Signature Series Fights Wear

75% more engine protection against horsepower loss and wear.A

Signature Series Fights Wear – 75% more engine protection against horsepower loss and wear.

ABased on independent testing of AMSOIL Signature Series 0W-20, in ASTM D6891 as required by the API SN specification.


Signature Series Fights Viscosity Breakdown

AMSOIL fights viscosity breakdown better than the competition,O providing superior protection of pistons, cams and bearings.

Signature Series Fights Viscosity Breakdown – AMSOIL fights viscosity breakdown better than the competition, proving superior protection of pistons, cams and bearings.

OBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30, Schaeffer’s Supreme 9000 5W-30, Lucas Synthetic 5W-30, Valvoline Conventional Daily Protection 5W-30, Pennzoil 5W-30 and AMSOIL Signature Series 5W-30 in the Kurt Orbahn test. Oils purchased on 05/03/18.


Signature Series Delivers Powerful Protection

AMSOIL delivers powerful protection. How good is it? An independent lab compared AMSOIL synthetic motor oil head-to-head against a leading competitor in a 100,000-mile test.P AMSOIL provided far superior wear protection and kept bearings looking like new.

Signature Series Delivers Powerful Protection – AMSOIL delivers powerful protection.  How good is it?  An independent lab compared AMSOIL synthetic motor oil head-t-head against a leading competitor in a 100,000-mile test.  AMSOIL provided far superior wear protection and kept bearings looking like new.

PTesting conducted in an independent lab using AMSOIL Signature Series 5W-30 Synthetic Motor Oil and a leading synthetic-blend 5W-30 motor oil in Ford F-150 trucks with 3.5L twin-turbo engines.


Signature Series Protects Against LSPI

AMSOIL Synthetic Motor Oils achieved 100% protection against LSPI.B

Signature Series protects Against LSPI – AMSOIL Synthetic Motor oil achieved 100% protection against LSPI.

Example of piston damage due to an LSPI event observed during the testing of a competitor’s motor oil. The red arrows indicate sections of the ring land that have broken away from the piston.

BBased on zero LSPI events in five consecutive tests of AMSOIL Signature Series, XL and OE 5W-30 Motor Oil in the LSPI engine test required by the GM dexos1 Gen 2 specification.


Signature Series Resists Viscosity Increase

Signature Series is barely challenged by the industry-standard testing, demonstrating only a 0.1% viscosity increase. Even when the test length is doubled, AMSOIL delivered twice the viscosity control required by the standard.GG

Signature Series resists viscosity increase – in industry-standard testing, it demonstrated only 0.1% viscosity increase.

GGBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.


Keeps Engines Clean

  • Formulated with superior thermal durability that resists breakdown and keeps pistons clean.
  • Controls heat and minimizes performance-robbing deposits.
  • Maximizes engine life and performance.

Helps Keep Engines Cleaner

Signature Series is fortified with a heavy treatment of detergent additives, delivering 28 percent more acid-neutralizing power than Mobil 1* and helping engines stay cleaner, longer.LL

LLBased upon independent testing of Mobil 1 Annual Protection Full Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased July 2020.


Signature Series Guards Turbos

Protects turbochargers 72% better than requiredC by the GM dexos1* Gen 2 specification.

Signature Series Guards Turbos – Protects turbochargers 72% better than required by the GM dexos1 Gen 2 specification.

CBased on independent testing of AMSOIL Signature Series 5W-30 in the GM turbo coking test.


Signature Series Cleans

Signature Series has 50% more detergentsD to help keep oil passages clean and promote oil circulation. It provides 90% better protection against sludge.DD

Signature Series Cleans – AMSOIL Signature Series Synthetic Motor Oil has 50% more detergents to help keep oil passages clean and promote oil circulation.  It provides 90% better protection against sludge.

The oil pick-up tube screen is virtually free of sludge.

Dvs. AMSOIL OE Motor Oil

DDBased on independent testing of AMSOIL Signature Series 5W-30 in the ASTM D6593 engine test for oil screen plugging as required by the API SN specification.


Signature Series Neutralizes Acids

AMSOIL Signature Series is fortified with a heavy treatment of detergent additive and it delivers 30% more acid neutralizing powerE than Mobil 1,* and 36% more than Royal Purple,* helping engines to stay cleaner, longer.

Signature Series Neutralizes Acids – AMSOIL Signature Series is fortified with a heavy treatment of detergent additive and it delivers 30% more acid neutralizing power than Mobil 1, and 36% more than Royal Purple, helping engines to stay cleaner, longer.

EBased upon independent testing of Mobil 1 Annual Protection 5W-30, Royal Purple High Performance 5W-30, Schaeffer’s Supreme 9000 Full Synthetic 5W-30, Royal Purple High Performance 5W-30, Pennzoil 5W-30, Pennzoil Platinum Full Synthetic 5W-30, Valvoline Conventional Daily Protection 5W-30, Valvoline Full Synthetic Modern Engine 5W-30, Lucas Synthetic 5W-30 and AMSOIL Signature Series 5W-30 in ASTM D2896. Oils purchased 05/03/18


Signature Series Helps Keep Valves Clean

AMSOIL fights volatilityU 38% better than Mobil 1* and 17% better than Royal Purple,* helping reduce oil consumption and keep valves clean.

Signature Series Helps Keep Valves Clean – AMSOIL fights volatility 38% better than Mobil 1 and 17% better than Royal Purple, helping reduce oil consumption and keep valves clean.

UBased on independent testing of AMSOIL Signature Series Synthetic 5W-20, Mobil 1*Advanced Synthetic 5W-20, Royal Purple* High Performance Synthetic 5W-20, Valvoline* Advanced, Pennzoil Platinum*, Valvoline* High Mileage, Mobil 1* Annual Protection, Schaeffer’s* Supreme 9000, Lucas* Oil, Pennzoil (conventional) and Valvoline* Daily Protection (conventional) in ASTM D5800. Oils purchased October-November 2018.


Keeps Pistons Cleaner

Even after doubling the length of the industry-standard test, AMSOIL delivered 40% cleaner pistons than required by the standard.FF

AMSOIL Keeps Pistons Cleaner – Even after doubling the length of the industry-standard test.  AMSOIL delivered 40% cleaner pistons than required by the standard.

FFBased on independent testing of AMSOIL Signature Series 5W-30 in the Sequence IIIH Engine Test (ASTM D8111), required by the ILSAC GF-6 and API SP specifications.


Trusted by Professionals

Dedicated engine builders and mechanics put in long hours honing their craft. These architects of powerful, high-performance engines turn to Signature Series to protect their passion.

Hear what they have to say.

 


 


Signature Series 5W-20 Synthetic Motor Oil



Signature Series 5W-20 Synthetic Motor Oil

  • 5
    The Best
    By  Lynn,  a  Verified Buyer  from  IN  on  December 07, 2021

    Describe the issue

    Absolutely the best on the market. I use Amsoil in vehicles, lawn mowers, and even my standby generator. Has never let me down...........
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    oil
    By  MARK,  a  Verified Buyer  from  Alabama  on  December 06, 2021

    Describe the issue

    I been using this for a very long time it keeps the engine clean.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    1 oil Change a Year
    By  JOHN,  a  Verified Buyer  from  Sacramento  on  December 06, 2021

    Describe the issue

    I have a car that I used to use fir Uber/lyft, Now I don’t drive that car much, so i use this oil, one oil chance per year, I’m driving less than 20,000 miles a year for sure, save money stay protected
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Will soon Be putting this in 2007 Lexus Rx 400h
    By  JOHN,  a  Verified Buyer  from  Sacramento  on  December 06, 2021

    Describe the issue

    On my next Oil change I will be Replacing with this Oil, I intend to do one or two oil changes a year only as we don’t drive that much. If they had a filter that goes with this oil I woild buy it.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Signature 0w-20
    By  wayne,  a  Verified Buyer  from  UT  on  December 06, 2021

    Describe the issue

    Best oil in the world. 2007 Prius: 200,000 miles and only added 1/4 quart in 19,000 miles. No motor wear, no sludge, no mechanic bills.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    5W-20 Syn.
    By  JC,  a  Verified Buyer  from  Riverside, CA.  on  December 05, 2021

    Describe the issue

    Was first introduced to AMSOIL by uncle a few years back. Have a 05 F150 XLT super-crew cab with that troublesome 54L 3 valve triton engine. Was starting to have to add about a quart of a oil every couple of weeks, granted the engine had 265,732 miles at the time. Uncle told me to use AMSOIL synthetic, and I should see a difference. I'll be damned if it didn't make a difference. After the initial oil change to the AMSOIL, it was probably a few when I checked my oil level, it was still where I had topped it off at. Don't know what additives they use, but definitely the engine ran smoother, no more oil loss between changes. Well, I just replaced that engine, the original engine in the truck, was at 275,586 miles, it was tired. Definitely starting the new engine out on the AMSOIL 5W-20 synthetic, if it made that much improvement to an old tired engine, I can just imagine the results I'll have with a brand new engine and AMSOIL right from start, the truck will definitely be outlasting me!!
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Always runs well
    By  WILLIAM,  a  Verified Buyer  from  Arizona  on  December 04, 2021

    Describe the issue

    Have been using Amsoil in my pickups and side by side with great success. 250,000 miles on last truck, still running strong when I traded it.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    As ordered
    By  RICHARD,  a  Verified Buyer  from  Harrison, AR  on  December 04, 2021

    Describe the issue

    Promptly taken care of
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    where is my oil?
    By  Charles,  a  Verified Buyer  from  AZ  on  December 03, 2021

    Describe the issue

    Received my oil filters 3 weeks ago, still waiting for the oil, where is my oil?
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?
  • 5
    Synthetic Upgrade
    By  CHARLES,  a  Verified Buyer  from  Grand Prairie, TX  on  December 03, 2021

    Describe the issue

    I upgraded to this lubricant from Mobile 1. I noticed an improvement in my gas mileage and the performance of my Ford F-150 Supercrew with the 5.4 engine and a hair over 95,000 miles. I would definitely recommend AMSOIL.
    Bottom Line
    Yes, I would recommend this to a friend.
    Was this review helpful?